docs: def create_snapshot(self, name, tag):
          """
          Create new instance of image with snaphot image (it is copied inside class constructuor)
  
          :param name: str - name of image - not used now
          :param tag: str - tag for image
          :return: NspawnImage instance
          """
          source = self.local_location
          logger.debug("Create Snapshot: %s -> %s" % (source, name))
          # FIXME: actually create the snapshot via clone command
          if name and tag:
              output_tag = "{}:{}".format(name, tag)
          else:
              output_tag = name or tag
          return self.__class__(repository=source, tag=output_tag)